1261132833277 has 4 divisors (see below), whose sum is σ = 1291892170716. Its totient is φ = 1230373495840.

The previous prime is 1261132833229. The next prime is 1261132833293. The reversal of 1261132833277 is 7723382311621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 378386147161 + 882746686116 = 615131^2 + 939546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1261132833277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261132803277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15379668658 + ... + 15379668739.

It is an arithmetic number, because the mean of its divisors is an integer number (322973042679).

Almost surely, 2^{1261132833277} is an apocalyptic number.

It is an amenable number.

1261132833277 is a deficient number, since it is larger than the sum of its proper divisors (30759337439).

1261132833277 is an equidigital number, since it uses as much as digits as its factorization.

1261132833277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30759337438.

The product of its digits is 508032, while the sum is 46.

The spelling of 1261132833277 in words is "one trillion, two hundred sixty-one billion, one hundred thirty-two million, eight hundred thirty-three thousand, two hundred seventy-seven".